The page in Turbotax where it asks the question to provide your Health Insurance Premiums states the below text. It's not clear and does not mention if the months have to be during the months you had self employment income or not. It just asks to include the premiums you paid in 2021.
Here is the exact text:
Tell us about health insurance premiums for your IT support services work
Review the amount you previously entered for health insurance premiums you paid for yourself, your spouse, and your dependents (under age 27) in 2021. Make any necessary changes if the amount isn’t correct.
Be sure to not include premiums you paid for your employees or premiums paid through Healthcare.gov or your state marketplace.
